import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:lamp_app/page/home/home_page.dart';
import 'package:lamp_app/page/login/login_page.dart';
import 'package:lamp_app/page/real/real_page.dart';
import 'package:lamp_app/page/real/test_page.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'data/local/local_storage.dart';
import 'widget/keep_alive_wrapper.dart';
import 'generated/assets.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await SharedPreferencesManager().init();
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    String? token = SharedPreferencesManager().getToken();
    return MaterialApp(
      title: '故障灯监测系统',
      // theme: ThemeData(
      //   // This is the theme of your application.
      //   //
      //   // TRY THIS: Try running your application with "flutter run". You'll see
      //   // the application has a purple toolbar. Then, without quitting the app,
      //   // try changing the seedColor in the colorScheme below to Colors.green
      //   // and then invoke "hot reload" (save your changes or press the "hot
      //   // reload" button in a Flutter-supported IDE, or press "r" if you used
      //   // the command line to start the app).
      //   //
      //   // Notice that the counter didn't reset back to zero; the application
      //   // state is not lost during the reload. To reset the state, use hot
      //   // restart instead.
      //   //
      //   // This works for code too, not just values: Most code changes can be
      //   // tested with just a hot reload.
      //   colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
      //   useMaterial3: true,
      // ),

      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: (token != null && token.isNotEmpty)
          ? MyHomePage(title: '故障灯监测系统')
          : LoginPage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int selectedIndex = 0;
  late PageController _pageController;

  @override
  void initState() {
    super.initState();
    _pageController = PageController(); // 初始化
  }

  void onItemTapped(index) {
    print('index===>$index');
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      // _counter++;

      selectedIndex = index;
      _pageController.jumpToPage(index);
      // pageController.jumpToPage(index);
    });
  }

  void updateSelectedIndex(int index) {
    print('index2334==>$index');
    setState(() {
      selectedIndex = index;
      // if (index == 2) {
      //   print('jumpMessage');
      //   userController.jumpMessage();
      // }
    });
  }

  @override
  Widget build(BuildContext context) {
    final pages = [
      KeepAliveWrapper(child: HomePage()),
      KeepAliveWrapper(child: RealPage()),
      // KeepAliveWrapper(child: TestPage()),
    ];
    double size = 22;
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
        // appBar: AppBar(
        //   // TRY THIS: Try changing the color here to a specific color (to
        //   // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
        //   // change color while the other colors stay the same.
        //   backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        //   // Here we take the value from the MyHomePage object that was created by
        //   // the App.build method, and use it to set our appbar title.
        //   title: Text(widget.title),
        // ),
        // body: Center(
        //   // Center is a layout widget. It takes a single child and positions it
        //   // in the middle of the parent.
        //   child: Column(
        //     // Column is also a layout widget. It takes a list of children and
        //     // arranges them vertically. By default, it sizes itself to fit its
        //     // children horizontally, and tries to be as tall as its parent.
        //     //
        //     // Column has various properties to control how it sizes itself and
        //     // how it positions its children. Here we use mainAxisAlignment to
        //     // center the children vertically; the main axis here is the vertical
        //     // axis because Columns are vertical (the cross axis would be
        //     // horizontal).
        //     //
        //     // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
        //     // action in the IDE, or press "p" in the console), to see the
        //     // wireframe for each widget.
        //     mainAxisAlignment: MainAxisAlignment.center,
        //     children: <Widget>[
        //       const Text(
        //         'You have pushed the button this many times:',
        //       ),
        //
        //     ],
        //   ),
        // ),
        body: Stack(
      children: [
        PageView(
          controller: _pageController,
          pageSnapping: false,
          physics: const NeverScrollableScrollPhysics(),
          children: pages,
          onPageChanged: (index) {
            updateSelectedIndex(index);
          },
        ),
        Positioned(
            bottom: 0,
            left: 0,
            right: 0,
            child: Stack(
              children: [
                Image.asset(
                  Assets.imagesBottomBg,
                  fit: BoxFit.cover,
                  // width: size,
                  // height: size,
                ),
                BottomNavigationBar(
                  currentIndex: selectedIndex,
                  onTap: onItemTapped,
                  type: BottomNavigationBarType.fixed,
                  backgroundColor: Colors.transparent,
                  elevation: 0,
                  selectedItemColor: Color(0xFF8DC2F1),
                  unselectedItemColor: Color(0xFFC1C3D3),
                  unselectedLabelStyle: TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.bold,
                  ),
                  selectedLabelStyle: TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.bold,
                  ),
                  items: <BottomNavigationBarItem>[
                    BottomNavigationBarItem(
                      icon: Image.asset(
                        Assets.imagesIcTab1,
                        width: size,
                        height: size,
                      ),
                      activeIcon: Image.asset(Assets.imagesIcActiveTab1,
                          width: size, height: size),
                      label: '首页',
                    ),
                    BottomNavigationBarItem(
                      icon: Image.asset(
                        Assets.imagesIcTab2,
                        width: size,
                        height: size,
                      ),
                      activeIcon: Image.asset(Assets.imagesIcActiveTab2,
                          width: size, height: size),
                      label: '实时数据',
                    ),
                  ],
                ),
              ],
            ))
      ],
    )

        // bottomNavigationBar:
        );
  }
}
